Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Solid State => Topic started by: worth on November 22, 2011, 06:19:36 am

Title: replacement transistors ?
Post by: worth on November 22, 2011, 06:19:36 am

I need to find replacement output transistors for a Peavey XM4 powered mixer. One is a Motorola SJ8227 MEX 8721.... the other is Motorola SJ226 MEX 8720. Peavey support hasn't responded to my e-mail.

Title: Re: replacement transistors ?
Post by: firemedic on November 22, 2011, 06:34:36 am

Check Mouser.com, if you don't see the part #s then call their customer support # and they may be able to get what you need.

Title: Re: replacement transistors ?
Post by: DummyLoad on November 22, 2011, 10:00:57 am

SJ-8227 *74140 Motorola MJ-15053  70474140  PNP 140V OUTPUT
SJ-8226 *84140 Motorola MJ-15052  70484140 NPN 140V OUTPUT

link to Peavey x-sistor x-ref

http://www.scribd.com/doc/29319120/Peavey-Semiconductor-Cross-Reference-List (http://www.scribd.com/doc/29319120/Peavey-Semiconductor-Cross-Reference-List)

mouser sells NTE.

NTE replacement NTE68 for the MJ-15053
NTE replacement NTE388 for the MJ-15052


respectfully, this should have been posted in solid state...

--DL

Title: Re: replacement transistors ?
Post by: worth on November 22, 2011, 03:49:10 pm

Thanks Dummy... that's what I needed.

Title: Re: replacement transistors ?
Post by: worth on November 22, 2011, 05:41:43 pm

Can someone explain the testing procedure for this transistor.. I know this post should be in "solid-state", but nobody would see it.

Title: Re: replacement transistors ?
Post by: DummyLoad on November 22, 2011, 06:04:53 pm

http://www.el34world.com/Forum/index.php?topic=12531.0 (http://www.el34world.com/Forum/index.php?topic=12531.0)

Title: Re: replacement transistors ?
Post by: plexi50 on November 22, 2011, 06:32:19 pm

Worth this is a very good video and explanation of PNP & NPN transistors and how to test them and more

Transistor Testing, the Basics (http://www.youtube.com/watch?v=EcfGXHoWiZ4#ws)